1. Altomare, A., Cascarano, C., Giacovazzo, C., Guagliardi, A., Moliterni, A. G. G., Burla, M. C., Polidori, G., Camalli, M. & Spagna, R. (1997). SIR97. University of Bari, Italy.
2. The crystal structure of Ca3Cu3(PO4)4
3. Synthesis and X-ray Powder Diffraction Study of New Phosphates in the Cu3(PO4)2–Sr3(PO4)2 System: Sr1.9Cu4.1(PO4)4, Sr3Cu3(PO4)4, Sr2Cu(PO4)2, and Sr9.1Cu1.4(PO4)7
4. Sr, Ba and Cd arsenates with the apatite-type structure
5. Dowty, E. (2000). ATOMS for Windows. Version 5.1. Shape Software, Kingsport, Tennessee, USA.